US Bridges

Mcdowell RD over Grand Canal

Fair

Maricopa County, Arizona · Mcdowell RD W of 32nd ST · Structure no. 09200

Built
1951
74 years old
Condition
Fair
inspected January 2025
Type
Slab
Concrete Continuous
Length
65 ft
3 main spans
Daily traffic
32,314
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Mcdowell RD over Grand Canal is a concrete continuous slab carrying Mcdowell RD over Grand Canal in Maricopa County, Arizona. It was built in 1951, so it is 74 years old, older than the Arizona average of 47.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 32,314 vehicles a day, roughly 1% of them trucks, projected to reach 32,324 by 2042. The structure is 65 ft (19.8 m) long and 72 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesMcdowell RD
CrossesGrand Canal
LocationMcdowell RD W of 32nd ST
RouteCity Street 0
CountyMaricopa County
StateArizona
Coordinates33.4657, -112.0162
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating43.1 US tons
Inventory rating25.8 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length65 ft (19.8 m)
Longest span25 ft (7.6 m)
Deck width72 ft (21.9 m)
Roadway width64 ft (19.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic32,314 (2023)
Projected traffic32,324 by 2042
Trucks1%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$1,000 (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Mcdowell RD over Grand Canal built?

It was built in 1951, making it 74 years old in 2025.

What condition is Mcdowell RD over Grand Canal in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in January 2025.

How much traffic does Mcdowell RD over Grand Canal carry?

About 32,314 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is Mcdowell RD over Grand Canal?

The structure is 65 ft (19.8 m) long with a longest span of 25 ft (7.6 m) and a deck 72 ft wide.

Who owns Mcdowell RD over Grand Canal?

It is owned by the City or Municipal Highway Agency.